jsp数据库连接大全

testOracle.jsp如下： <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String result = \"\"; // 查询结果字符串 String sql = \"select * from test\"; // SQL 字符串 // 连接字符串，格式： \"jdbc:数据库驱动名称:连接模式:@数据库服务器ip:端口号:数据库SID\" String url = \"jdbc:oracle:thin:@localhost:1521:orcl\"; String username = \"scott\"; // 用户名 String password = \"tiger\"; //密码 // 创建oracle数据库驱动实例 Class.forName(\"oracle.jdbc.driver.OracleDriver\").newInstance(); // 获得与数据库的连接 Connection conn = DriverManager.getConnection(url, username, password); // 创建执行语句对象 Statement stmt = conn.createStatement(); // 执行sql语句，返回结果集 ResultSet rs = stmt.executeQuery(sql); while ( rs.next() ) { result += \"\\n 第一个字段内容：\" + rs.getString(1) + \"
\"; } rs.close(); // 关闭结果集 stmt.close(); // 关闭执行语句对象 conn.close(); // 关闭与数据库的连接 %> <%=result%>

二、jsp连接Sql Server7.0/2000数据库

testSqlServer.jsp如下 <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String sql = \"select * from test\"; // 连接字符串，格式： \"jdbc:公司名称:数据库驱动名称://数据库服务器ip:端口号;DatabaseName=数据库名称\" String url = \"jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=pubs\"; String username = \"scott\"; String password = \"tiger\"; Class.forName(\"com.microsoft.jdbc.sqlserver.SQLServerDriver\").newInstance(); Connection conn = DriverManager.getConnection(url, username, password); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery(sql); %> <% while ( rs.next() ) { %> 第一个字段内容为：<%=rs.getStrisng(1)%>
<% } rs.close(); stmt.close(); conn.close(); %>

三、jsp连接DB2数据库 testDB2.jsp如下： <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String sql = \"select * from test\"; // 连接字符串，格式： \"jdbc:数据库驱动名称://数据库服务器ip:端口号/数据库名称\" String url = \"jdbc:db2://localhost:5000/sample\"; String username = \"scott\"; String password = \"tiger\"; Class.forName(\"com.ibm.db2.jdbc.app.DB2Driver\").newInstance(); Connection conn = DriverManager.getConnection(url, username, password); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery(sql); rs.close(); stmt.close(); conn.close(); %>

四、jsp连接Informix数据库

testInformix.jsp如下： <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String sql = \"select * from test\"; // 连接字符串，格式： \"jdbc:数据库驱动名称://数据库服务器ip:端口号/数据库名称:INformIXSERVER=服务器名;user=用户名;password=密码\" String url = \"jdbc:informix-sqli://123.45.67.89:1533/testDB:INformIXSERVER=myserver;user=testuser;password=testpassword\"; Class.forName(\"com.informix.jdbc.IfxDriver\").newInstance(); Connection conn = DriverManager.getConnection(url); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery(sql); rs.close(); stmt.close(); conn.close(); %>

五、jsp连接Sybase数据库 testSybase.jsp如下： <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String sql = \"select * from test\"; // 连接字符串，格式： \"jdbc:公司名称:数据库驱动名称:数据库服务器ip:端口号/数据库名称\" String url = \"jdbc:sybase:Tds:localhost:5007/tsdata\"; Properties prop = System.getProperties(); prop.put(\"user\", \"userid\"); // 用户名 prop.put(\"password\", \"user_password\"); // 密码 Class.forName(\"com.sybase.jdbc.SybDriver\").newInstance(); Connection conn = DriverManager.getConnection(url, prop); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery(sql); rs.close(); stmt.close(); conn.close(); %>

六、jsp连接MySQL数据库 testMySQL.jsp如下： <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String sql = \"select * from test\"; // 连接字符串，格式： \"jdbc:数据库驱动名称://数据库服务器ip/数据库名称?user=用户名&password=密码&使用Unicode=布尔值&字符编码=编码\" String url = \"jdbc:mysql://localhost/softforum?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1\"; String username = \"scott\"; String password = \"tiger\"; Class.forName(\"org.gjt.mm.mysql.Driver\").newInstance(); Connection conn = DriverManager.getConnection(url, username, password); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery(sql); rs.close(); stmt.close(); conn.close(); %>

七、jsp连接PostgreSQL数据库

testPostgreSQL.jsp如下： <%@ page contentType=\"text/html;charset=gb2312\"%> <%@ page import=\"java.sql.*\"%> <% String sql = \"select * from test\"; // 连接字符串，格式： \"jdbc:数据库驱动名称://数据库服务器ip/数据库名称\" String url = \"jdbc:postgresql://localhost/soft\"; String username = \"scott\"; String password = \"tiger\"; Class.forName(\"\"org.postgresql.Driver\").newInstance(); Connection conn = DriverManager.getConnection(url, username, password); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery(sql); rs.close(); stmt.close(); conn.close(); %> 下面是简单的数据库操作Javabean的代码:

DbWrapper.java import java.sql.*;import java.util.*;publicclass DbWrapper {// 定义连接池对象为静态变量，将一直存在，直到工作目录关闭。privatestatic DataSource ds =null; // 1.用连接池的方式获得连接// 如果不是做多数据库程序，推荐使用此方法// 相关内容：在tomcat管理界面配置连接池publicstatic Connection openConnection()throws Exception {// 只需要初始化1次if( ds ==null){ Context initContext =newInitialContext(); Context envContext =(Context) initContext.lookup(\"java:/comp/env\"); DataSource ds =(DataSource) envContext.lookup(\"jdbc/MyDataSource\");}return ds.getConnection();}// 2.用jdbc驱动获得连接// 相关内容：JSP数据库连接大全publicstatic Connection openConnection( String driver, String url, String username, String password)throws Exception { Class.forName(driver).newInstance();return DriverManager.getConnection(url, username, password);}publicstaticvoidcloseConnection(Connection conn)throws Exception {if( conn !=null){ conn.close();}} publicstaticintexecuteUpdate(String sql)throws Exception {int count =0; Connection conn =null; Statement stmt =null;try{ conn =openConnection(); stmt = conn.createStatement(); count = stmt.executeUpdate(sql);}catch( Exception e ){throw e;}finally{closeConnection(conn);}return count;}publicstatic List executeQuery(String sql)throws Exception { List list =newArrayList(); Connection conn =null; Statement stmt =null; ResultSet rs =null;try{ conn =openConnection(); stmt = conn.createStatement(); rs = stmt.executeQuery(sql); ResultSetMetaData rsmd = rs.getMetaData();while( rs.next()){ Map map =newHashMap();for(int i =1; i <= rsmd.getColumnCount(); i++){ map.put(rsmd.getColumnName(i), rs.getObject(i));} list.add(map);} }catch( Exception e ){ e.printStackTrace();}finally{if( rs !=null) rs.close();closeConnection(conn);}return list; }}

// 1.对于insert, update, delete语句 int count = DbWrapper.executeUpdate(sql); // 2.对于selete语句 java.util.List list = DbWrapper.executeQuery(sql); // 方法一:按名字取值，注意大小写是严格区分的for(int i =0; i < list.size(); i++){ java.util.Map map =(java.util.Map)list.get(i); out.println(mag.get(\"column_name\").toString());} // 方法二：遍历取值for(int i =0; i < list.size(); i++){ java.util.Map map =(java.util.Map)list.get(i); for(java.util.Iterator it = map.keySet().iterator(); it.hasNext();){ String column_name = it.next().toString()); // 取值时注意null判断 out.println(column_name +\" = \"+ map.get(column_name) ==null?\"\": map.get(column_name).toString());}}